初學SpringCloud 跟着視頻寫配置 前前后后檢查了許久，配置代碼沒問題
最后發現是client項目的配置文件名有問題，不應該是application.yml 而是bootstrap.yml
那么重要的知識點，講師居然沒重點強調，坑
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spring錯誤
：Could not resolve placeholder XXX in string value XXX
Could not resolve placeholder ‘xxx‘ in value “${xxx}“
Could not resolve placeholder ‘xxx‘ in value “${xxx}“
java.lang.IllegalArgumentException: Could not resolve placeholder 'XXX' in string value "${XXX}"
spring-cloud-config-client 報Could not resolve placeholder 'foo' in value "${foo}"錯誤
異常:java.lang.IllegalArgumentException: Could not resolve placeholder 'xxx' in value "${xxx}"
Springboot 2.x 無法讀取yml配置值的問題：Could not resolve placeholder xxx value '${xxx}'
【微服務】Springboot和ActiveMQ整合出現 Could not resolve placeholder 'xxx' in value "${xxx}"
配置中心入門案例以及出現Could not resolve placeholder 'XXX' in value "${XXX}"的解決方式
springboot啟動報錯Could not resolve placeholder xxx